Question

Qual o valor numérico?

Answer 1

$27^{2/3} - 8^{1/3} +81^{3/4} = \\\\ \sqrt[3]{27 ^2} - \sqrt[3]{8} + \sqrt[4]{81^3}=\\\\ \sqrt[3]{729} -2 + \sqrt[4]{531441}= \\\\ 9-2+27=\\\\ \Large\boxed{\boxed{34}}$